Improvement in mill-gearing



M. SMITH. MILL GEARING.

No 104,783. Patanted June 28, 1870.

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HARLOW M. SMITH, OF PEORIA. ILLINOIS.

Letters Patent No. 104,783, dated June 28, 187 O,

IMPROVEMENT IN MILL-GEARING.

The Schedule referred to in these Letters Patentpnd making part of the same.-

To all whom it may concern.-

Be it known that I, HA'nLow M. SMITH, of the city of Peoria, in the county of Peoria and in the State of Illinois, have invented a new and useful Improvement in Mill-Gearing; and do hereby declarcthat the following is a full, clear,aud exactdescription thereof, reference being had to the annexed drawing making a part of this specification, in which like letters of reference refer to like parts, and in whioh Figure 1 represents a perspectiveview.

Figure 2, a sectional elevation.

Figure 3, a plan view;

. This inventionrelates to the driving of mill-spin; dies by a wheel with the cog or spurs on its interior surface, its center and armsbeing dished or depressed to make room for the smaller spur-wheels orspur-core pinions and their supporting bridge-tree, the spur wheels on the spindles being placed within the wheel and supported on a proper bridge-tree.

A is a concave bridge-tree within the wheel B, its interior surface being low enough to form asupport for a spur-core pinion, H, and rests, by means of a sufficient number of horizontal arms, D D, on the Hurst frame E E, above the 'bevel of the wheel B,

and to whichthey are securely bolted. l A circular opening, J, in the middle of the bridgetree, admits the vvertical shaft F of the wheel 13 below, and a rib or flange,e, running around the openings, gives strength to the tree. The latter may be'further strengthened by means of ribs alongeach arm I).

B is a dished or concave spur-wheel, supported by dished arms radiating from its hub or nave some distance below the plane of its spurs or cogs, so as to allow the spurred interior surface of wheel to embrace the concave bridge-tree A, leaving room enough between each arm of the bridge-tree for the cogs to engage with the pinions H. The interior of this wheel is provided with vertical cogs or spurs, and can be cast separate from its dished arms, to which it may be then united by a flange and bolts, or equivalent fastenings.-

' This wheel B may receive its impetus from aproper wheel on its shaft, or a bevel-wheel, G, maybe bolted to, the arms of the former, as at b b.

H is one-of a series of core-spur -pinions on the mill-spindle 9, set in the step j; resting on the bridgetree A, and engages, through one of the spaces between the arms D D, with the internal spur-wheel B As many as four spindles and pinions may be set within this wheel. This kind of pinions is deemed best on account of the economy of time in still running the engaged pinions, if necessary, up to the last moment, while a. new set are being set with spurs to replace them; also, that greater ease of motion, ess jarring, 850., are secured by wooden spur-pinions.

The usual step 1, lever, and screw (1, are employed to regulate the grade of flour, by lifting the running buhr-stone above the stone h.

he concave spur-wheel may be substituted by a bevel spur-wheel, and the core spur-pinions by bevelpinions, but the plan first described is deemed far preferable. 7

Having. thusfully described my invention,

What I claim therein as new, and desire to secure by Letters Patent, is-- The concave bridge-tree A, with arms D bolted to the Hurst frame E, for supporting mill-spindles or other gearing, in combination with the interior gearwheel B, having either a spur or bevclgear, H, on its interior circumference, and constructed with concave or .dishe'd arms, substantially as described.

In testimony that'I claim the foregoing as myinvention, I have hereunto set my hand this 24th day of November, 1869.

Witnesses: HARLOW'M. SMITH;

HENRY W. Wnnns, EDMUND Tnunnow; 

